Rail fitting



FIG. 1 is a front perspective view illustrating my design;

FIG. 2 is a top elevation view thereof;

FIG. 3 is a bottom elevation view thereof;

FIG. 4 is a front elevation view thereof 1;

FIG. 5 is a rear elevation view thereof;

FIG. 6 is a front right side view thereof; and,

FIG. 7 is a left side view thereof. 

CLAIM The ornamental design for a rail fitting, as shown. 